Porosity and mechanical properties of zirconium ceramics

Abstract

Abstract. The article studies the porous ceramics consisting of ultra-fine ZrO 2 powders. The porosity of ceramic samples varied from 15% to 80%. The structure of the ceramic materials had a cellular configuration. The distinctive feature of all experimentally obtained strain diagrams is their nonlinearity at low deformations characterized by the parabolic law. It was shown that the observed nonlinear elasticity for low deformations shown in strain diagrams is due to the mechanical instability of cellular elements of the ceramic framework.

Deformation and Damage Accumulation in a Ceramic Composite under Dynamic Loading

“…The obtained data agree well with the measurements of static strength characteristics of the considered class of composites [8].…”

Brittle porous material mesovolume structure models and simulation of their mechanical properties

“…1(c). The ceramics was obtained by sintering of nanostructured zirconia powders [8]. It is seen that in realistic ceramics there are pores of different morphologies in one and the same material.…”

Damage formation, fatigue behavior and strength properties of ZrO2-based ceramics

“…This raises the question as to what materials of this class produced by what technologies are most suitable for particular applications in vital structural members and critical parts. The high degrees of biological compatibility and chemical inertness allow for using the ceramics in medical engineering applications (for example, as osteoreplacing materials) [1][2][3][4]. Among the variety of structural ceramic materials, investigations of partially stabilized zirconia-based ceramics are of prime interest due to a comprehensive impact of porosity, grain structure, and phase composition on their mechanical behavior.…”

“…Among the variety of structural ceramic materials, investigations of partially stabilized zirconia-based ceramics are of prime interest due to a comprehensive impact of porosity, grain structure, and phase composition on their mechanical behavior. It is known that different molding forces and sintering temperatures provide materials with different porosities [4]. The foregoing parameters affect the physical and mechanical properties of the oxide ceramics, ranging from low performance characteristics, as in bone tissues, to record high characteristics, as in structural steels and alloys.…”

“…The foregoing parameters affect the physical and mechanical properties of the oxide ceramics, ranging from low performance characteristics, as in bone tissues, to record high characteristics, as in structural steels and alloys. Nowadays a large body of research is devoted to the relation between internal structure of zirconia-based ceramics and their mechanical properties, like compressive strength, bending strength, fracture toughness, and microhardness [2][3][4][5]. However, little is known about the fatigue behavior of porous ceramic materials [6,7].…”